These durable bushing upgrades last up to 5 times longer than original equipment rubber bushings. What's more, we offer a number of firmness options with our Polybush Kits - allowing you to tune your ride performance from a soft to stiff ride. These polybushes will not erode from chemicals, road salts or other harmful petroleum distillates. They act like discs on your Rover's 'spinal cord', keeping radial arms and panhard rods supple and responsive. Blue polybush sets offer a softer ride, orange polybushes provide a standard ride stiffness while red polybushes offer the stiffest ride.